| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens having a wide angle of view and a high variable power ratio, made compact and having high optical performance, and optical equipment having the same. SOLUTION: The zoom lens has a first negative lens group G1, an aperture stop S, a second positive lens group G2 and a third positive lens group G3 in order from an object side along an optical axis. When varying power from a wide angle end state to a telephoto end state, at least the first lens group and the second lens group move. The first lens group is constituted of a negative meniscus lens turning its convex surface to the object side, a negative lens and a positive lens in order from the object side, and at least one lens surface of the negative lens is aspherical. The second lens group is constituted of a first positive lens, a second positive lens, a negative lens and a third positive lens in order from the object side, and at least one surface out of the respective lens surfaces included in the second lens group is aspherical. The zoom lens 2 satisfies a predetermined condition, and the optical equipment 1 has the zoom lens 2. COPYRIGHT: (C)2008,JPO&INPIT
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